#include <errno.h>
#include <sys/ucontext.h>
-#ifdef __ia64__
-#undef uc_mcontext
-#undef uc_sigmask
-#undef uc_stack
-#undef uc_link
-#endif
-
#include "qemu.h"
//#define DEBUG_SIGNAL
static void host_signal_handler(int host_signum, siginfo_t *info,
void *puc);
-/* XXX: do it properly */
+static uint8_t host_to_target_signal_table[65] = {
+ [SIGHUP] = TARGET_SIGHUP,
+ [SIGINT] = TARGET_SIGINT,
+ [SIGQUIT] = TARGET_SIGQUIT,
+ [SIGILL] = TARGET_SIGILL,
+ [SIGTRAP] = TARGET_SIGTRAP,
+ [SIGABRT] = TARGET_SIGABRT,
+/* [SIGIOT] = TARGET_SIGIOT,*/
+ [SIGBUS] = TARGET_SIGBUS,
+ [SIGFPE] = TARGET_SIGFPE,
+ [SIGKILL] = TARGET_SIGKILL,
+ [SIGUSR1] = TARGET_SIGUSR1,
+ [SIGSEGV] = TARGET_SIGSEGV,
+ [SIGUSR2] = TARGET_SIGUSR2,
+ [SIGPIPE] = TARGET_SIGPIPE,
+ [SIGALRM] = TARGET_SIGALRM,
+ [SIGTERM] = TARGET_SIGTERM,
+#ifdef SIGSTKFLT
+ [SIGSTKFLT] = TARGET_SIGSTKFLT,
+#endif
+ [SIGCHLD] = TARGET_SIGCHLD,
+ [SIGCONT] = TARGET_SIGCONT,
+ [SIGSTOP] = TARGET_SIGSTOP,
+ [SIGTSTP] = TARGET_SIGTSTP,
+ [SIGTTIN] = TARGET_SIGTTIN,
+ [SIGTTOU] = TARGET_SIGTTOU,
+ [SIGURG] = TARGET_SIGURG,
+ [SIGXCPU] = TARGET_SIGXCPU,
+ [SIGXFSZ] = TARGET_SIGXFSZ,
+ [SIGVTALRM] = TARGET_SIGVTALRM,
+ [SIGPROF] = TARGET_SIGPROF,
+ [SIGWINCH] = TARGET_SIGWINCH,
+ [SIGIO] = TARGET_SIGIO,
+ [SIGPWR] = TARGET_SIGPWR,
+ [SIGSYS] = TARGET_SIGSYS,
+ /* next signals stay the same */
+};
+static uint8_t target_to_host_signal_table[65];
+
static inline int host_to_target_signal(int sig)
{
- return sig;
+ return host_to_target_signal_table[sig];
}
static inline int target_to_host_signal(int sig)
{
- return sig;
+ return target_to_host_signal_table[sig];
}
-void host_to_target_sigset(target_sigset_t *d, sigset_t *s)
+static void host_to_target_sigset_internal(target_sigset_t *d,
+ const sigset_t *s)
{
int i;
- for(i = 0;i < TARGET_NSIG_WORDS; i++) {
- d->sig[i] = tswapl(((unsigned long *)s)[i]);
+ unsigned long sigmask;
+ uint32_t target_sigmask;
+
+ sigmask = ((unsigned long *)s)[0];
+ target_sigmask = 0;
+ for(i = 0; i < 32; i++) {
+ if (sigmask & (1 << i))
+ target_sigmask |= 1 << (host_to_target_signal(i + 1) - 1);
+ }
+#if TARGET_LONG_BITS == 32 && HOST_LONG_BITS == 32
+ d->sig[0] = target_sigmask;
+ for(i = 1;i < TARGET_NSIG_WORDS; i++) {
+ d->sig[i] = ((unsigned long *)s)[i];
}
+#elif TARGET_LONG_BITS == 32 && HOST_LONG_BITS == 64 && TARGET_NSIG_WORDS == 2
+ d->sig[0] = target_sigmask;
+ d->sig[1] = sigmask >> 32;
+#else
+#warning host_to_target_sigset
+#endif
+}
+
+void host_to_target_sigset(target_sigset_t *d, const sigset_t *s)
+{
+ target_sigset_t d1;
+ int i;
+
+ host_to_target_sigset_internal(&d1, s);
+ for(i = 0;i < TARGET_NSIG_WORDS; i++)
+ __put_user(d1.sig[i], &d->sig[i]);
}
-void target_to_host_sigset(sigset_t *d, target_sigset_t *s)
+void target_to_host_sigset_internal(sigset_t *d, const target_sigset_t *s)
{
int i;
- for(i = 0;i < TARGET_NSIG_WORDS; i++) {
- ((unsigned long *)d)[i] = tswapl(s->sig[i]);
+ unsigned long sigmask;
+ target_ulong target_sigmask;
+
+ target_sigmask = s->sig[0];
+ sigmask = 0;
+ for(i = 0; i < 32; i++) {
+ if (target_sigmask & (1 << i))
+ sigmask |= 1 << (target_to_host_signal(i + 1) - 1);
+ }
+#if TARGET_LONG_BITS == 32 && HOST_LONG_BITS == 32
+ ((unsigned long *)d)[0] = sigmask;
+ for(i = 1;i < TARGET_NSIG_WORDS; i++) {
+ ((unsigned long *)d)[i] = s->sig[i];
}
+#elif TARGET_LONG_BITS == 32 && HOST_LONG_BITS == 64 && TARGET_NSIG_WORDS == 2
+ ((unsigned long *)d)[0] = sigmask | ((unsigned long)(s->sig[1]) << 32);
+#else
+#warning target_to_host_sigset
+#endif /* TARGET_LONG_BITS */
}
+void target_to_host_sigset(sigset_t *d, const target_sigset_t *s)
+{
+ target_sigset_t s1;
+ int i;
+
+ for(i = 0;i < TARGET_NSIG_WORDS; i++)
+ __get_user(s1.sig[i], &s->sig[i]);
+ target_to_host_sigset_internal(d, &s1);
+}
+
void host_to_target_old_sigset(target_ulong *old_sigset,
const sigset_t *sigset)
{
- *old_sigset = tswap32(*(unsigned long *)sigset & 0xffffffff);
+ target_sigset_t d;
+ host_to_target_sigset(&d, sigset);
+ *old_sigset = d.sig[0];
}
void target_to_host_old_sigset(sigset_t *sigset,
const target_ulong *old_sigset)
{
- sigemptyset(sigset);
- *(unsigned long *)sigset = tswapl(*old_sigset);
+ target_sigset_t d;
+ int i;
+
+ d.sig[0] = *old_sigset;
+ for(i = 1;i < TARGET_NSIG_WORDS; i++)
+ d.sig[i] = 0;
+ target_to_host_sigset(sigset, &d);
}
/* siginfo conversion */
void signal_init(void)
{
struct sigaction act;
- int i;
+ int i, j;
+ /* generate signal conversion tables */
+ for(i = 1; i <= 64; i++) {
+ if (host_to_target_signal_table[i] == 0)
+ host_to_target_signal_table[i] = i;
+ }
+ for(i = 1; i <= 64; i++) {
+ j = host_to_target_signal_table[i];
+ target_to_host_signal_table[j] = i;
+ }
+
/* set all host signal handlers. ALL signals are blocked during
the handlers to serialize them. */
sigfillset(&act.sa_mask);
}
}
-#if defined(DEBUG_SIGNAL)
-#ifdef __i386__
-static void dump_regs(struct ucontext *uc)
-{
- fprintf(stderr,
- "EAX=%08x EBX=%08x ECX=%08x EDX=%08x\n"
- "ESI=%08x EDI=%08x EBP=%08x ESP=%08x\n"
- "EFL=%08x EIP=%08x\n",
- uc->uc_mcontext.gregs[EAX],
- uc->uc_mcontext.gregs[EBX],
- uc->uc_mcontext.gregs[ECX],
- uc->uc_mcontext.gregs[EDX],
- uc->uc_mcontext.gregs[ESI],
- uc->uc_mcontext.gregs[EDI],
- uc->uc_mcontext.gregs[EBP],
- uc->uc_mcontext.gregs[ESP],
- uc->uc_mcontext.gregs[EFL],
- uc->uc_mcontext.gregs[EIP]);
-}
-#else
-static void dump_regs(struct ucontext *uc)
-{
-}
-#endif
-
-#endif
-
static void host_signal_handler(int host_signum, siginfo_t *info,
void *puc)
{
/* the CPU emulator uses some host signals to detect exceptions,
we we forward to it some signals */
- if (host_signum == SIGSEGV || host_signum == SIGBUS) {
- if (cpu_x86_signal_handler(host_signum, info, puc))
+ if (host_signum == SIGSEGV || host_signum == SIGBUS
+#if defined(TARGET_I386) && defined(USE_CODE_COPY)
+ || host_signum == SIGFPE
+#endif
+ ) {
+ if (cpu_signal_handler(host_signum, info, puc))
return;
}
return;
#if defined(DEBUG_SIGNAL)
fprintf(stderr, "qemu: got signal %d\n", sig);
- dump_regs(puc);
#endif
host_to_target_siginfo_noswap(&tinfo, info);
if (queue_signal(sig, &tinfo) == 1) {
/* interrupt the virtual CPU as soon as possible */
- cpu_x86_interrupt(global_env);
+ cpu_interrupt(global_env, CPU_INTERRUPT_EXIT);
}
}
struct target_sigaction *oact)
{
struct emulated_sigaction *k;
+ struct sigaction act1;
+ int host_sig;
if (sig < 1 || sig > TARGET_NSIG)
return -EINVAL;
k = &sigact_table[sig - 1];
-#if defined(DEBUG_SIGNAL) && 0
+#if defined(DEBUG_SIGNAL)
fprintf(stderr, "sigaction sig=%d act=0x%08x, oact=0x%08x\n",
sig, (int)act, (int)oact);
#endif
k->sa.sa_flags = tswapl(act->sa_flags);
k->sa.sa_restorer = tswapl(act->sa_restorer);
k->sa.sa_mask = act->sa_mask;
+
+ /* we update the host linux signal state */
+ host_sig = target_to_host_signal(sig);
+ if (host_sig != SIGSEGV && host_sig != SIGBUS) {
+ sigfillset(&act1.sa_mask);
+ act1.sa_flags = SA_SIGINFO;
+ if (k->sa.sa_flags & TARGET_SA_RESTART)
+ act1.sa_flags |= SA_RESTART;
+ /* NOTE: it is important to update the host kernel signal
+ ignore state to avoid getting unexpected interrupted
+ syscalls */
+ if (k->sa._sa_handler == TARGET_SIG_IGN) {
+ act1.sa_sigaction = (void *)SIG_IGN;
+ } else if (k->sa._sa_handler == TARGET_SIG_DFL) {
+ act1.sa_sigaction = (void *)SIG_DFL;
+ } else {
+ act1.sa_sigaction = host_signal_handler;
+ }
+ sigaction(host_sig, &act1, NULL);
+ }
}
return 0;
}
+#ifndef offsetof
+#define offsetof(type, field) ((size_t) &((type *)0)->field)
+#endif
+
+static inline int copy_siginfo_to_user(target_siginfo_t *tinfo,
+ const target_siginfo_t *info)
+{
+ tswap_siginfo(tinfo, info);
+ return 0;
+}
+
#ifdef TARGET_I386
/* from the Linux kernel */
} target_stack_t;
struct target_ucontext {
- target_ulong uc_flags;
- target_ulong uc_link;
- target_stack_t uc_stack;
- struct target_sigcontext uc_mcontext;
- target_sigset_t uc_sigmask; /* mask last for extensibility */
+ target_ulong tuc_flags;
+ target_ulong tuc_link;
+ target_stack_t tuc_stack;
+ struct target_sigcontext tuc_mcontext;
+ target_sigset_t tuc_sigmask; /* mask last for extensibility */
};
struct sigframe
* Set up a signal frame.
*/
-#define __put_user(x,ptr)\
-({\
- int size = sizeof(*ptr);\
- switch(size) {\
- case 1:\
- stb(ptr, (typeof(*ptr))(x));\
- break;\
- case 2:\
- stw(ptr, (typeof(*ptr))(x));\
- break;\
- case 4:\
- stl(ptr, (typeof(*ptr))(x));\
- break;\
- case 8:\
- stq(ptr, (typeof(*ptr))(x));\
- break;\
- default:\
- abort();\
- }\
- 0;\
-})
-
-#define get_user(val, ptr) (typeof(*ptr))(*(ptr))
-
-
-#define __copy_to_user(dst, src, size)\
-({\
- memcpy(dst, src, size);\
- 0;\
-})
-
-static inline int copy_siginfo_to_user(target_siginfo_t *tinfo,
- const target_siginfo_t *info)
-{
- tswap_siginfo(tinfo, info);
- return 0;
-}
-
/* XXX: save x87 state */
static int
setup_sigcontext(struct target_sigcontext *sc, struct target_fpstate *fpstate,
{
int err = 0;
- err |= __put_user(env->segs[R_GS], (unsigned int *)&sc->gs);
- err |= __put_user(env->segs[R_FS], (unsigned int *)&sc->fs);
- err |= __put_user(env->segs[R_ES], (unsigned int *)&sc->es);
- err |= __put_user(env->segs[R_DS], (unsigned int *)&sc->ds);
+ err |= __put_user(env->segs[R_GS].selector, (unsigned int *)&sc->gs);
+ err |= __put_user(env->segs[R_FS].selector, (unsigned int *)&sc->fs);
+ err |= __put_user(env->segs[R_ES].selector, (unsigned int *)&sc->es);
+ err |= __put_user(env->segs[R_DS].selector, (unsigned int *)&sc->ds);
err |= __put_user(env->regs[R_EDI], &sc->edi);
err |= __put_user(env->regs[R_ESI], &sc->esi);
err |= __put_user(env->regs[R_EBP], &sc->ebp);
err |= __put_user(env->exception_index, &sc->trapno);
err |= __put_user(env->error_code, &sc->err);
err |= __put_user(env->eip, &sc->eip);
- err |= __put_user(env->segs[R_CS], (unsigned int *)&sc->cs);
+ err |= __put_user(env->segs[R_CS].selector, (unsigned int *)&sc->cs);
err |= __put_user(env->eflags, &sc->eflags);
err |= __put_user(env->regs[R_ESP], &sc->esp_at_signal);
- err |= __put_user(env->segs[R_SS], (unsigned int *)&sc->ss);
+ err |= __put_user(env->segs[R_SS].selector, (unsigned int *)&sc->ss);
cpu_x86_fsave(env, (void *)fpstate, 1);
fpstate->status = fpstate->sw;
/* non-iBCS2 extensions.. */
err |= __put_user(mask, &sc->oldmask);
- err |= __put_user(env->cr2, &sc->cr2);
+ err |= __put_user(env->cr[2], &sc->cr2);
return err;
}
}
/* This is the legacy signal stack switching. */
- else if ((regs->xss & 0xffff) != __USER_DS &&
- !(ka->sa.sa_flags & SA_RESTORER) &&
- ka->sa.sa_restorer) {
- esp = (unsigned long) ka->sa.sa_restorer;
- }
+ else
#endif
- return (void *)((esp - frame_size) & -8ul);
+ if ((env->segs[R_SS].selector & 0xffff) != __USER_DS &&
+ !(ka->sa.sa_flags & TARGET_SA_RESTORER) &&
+ ka->sa.sa_restorer) {
+ esp = (unsigned long) ka->sa.sa_restorer;
+ }
+ return (void *)((esp - frame_size) & -8ul);
}
static void setup_frame(int sig, struct emulated_sigaction *ka,
target_sigset_t *set, CPUX86State *env)
{
struct sigframe *frame;
- int err = 0;
+ int i, err = 0;
frame = get_sigframe(ka, env, sizeof(*frame));
-#if 0
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
goto give_sigsegv;
-#endif
err |= __put_user((/*current->exec_domain
&& current->exec_domain->signal_invmap
&& sig < 32
if (err)
goto give_sigsegv;
- if (TARGET_NSIG_WORDS > 1) {
- err |= __copy_to_user(frame->extramask, &set->sig[1],
- sizeof(frame->extramask));
- }
- if (err)
- goto give_sigsegv;
+ for(i = 1; i < TARGET_NSIG_WORDS; i++) {
+ if (__put_user(set->sig[i], &frame->extramask[i - 1]))
+ goto give_sigsegv;
+ }
/* Set up to return from userspace. If provided, use a stub
already in userspace. */
target_sigset_t *set, CPUX86State *env)
{
struct rt_sigframe *frame;
- int err = 0;
+ int i, err = 0;
frame = get_sigframe(ka, env, sizeof(*frame));
-#if 0
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
goto give_sigsegv;
-#endif
err |= __put_user((/*current->exec_domain
&& current->exec_domain->signal_invmap
goto give_sigsegv;
/* Create the ucontext. */
- err |= __put_user(0, &frame->uc.uc_flags);
- err |= __put_user(0, &frame->uc.uc_link);
- err |= __put_user(/*current->sas_ss_sp*/ 0, &frame->uc.uc_stack.ss_sp);
+ err |= __put_user(0, &frame->uc.tuc_flags);
+ err |= __put_user(0, &frame->uc.tuc_link);
+ err |= __put_user(/*current->sas_ss_sp*/ 0,
+ &frame->uc.tuc_stack.ss_sp);
err |= __put_user(/* sas_ss_flags(regs->esp) */ 0,
- &frame->uc.uc_stack.ss_flags);
- err |= __put_user(/* current->sas_ss_size */ 0, &frame->uc.uc_stack.ss_size);
- err |= setup_sigcontext(&frame->uc.uc_mcontext, &frame->fpstate,
+ &frame->uc.tuc_stack.ss_flags);
+ err |= __put_user(/* current->sas_ss_size */ 0,
+ &frame->uc.tuc_stack.ss_size);
+ err |= setup_sigcontext(&frame->uc.tuc_mcontext, &frame->fpstate,
env, set->sig[0]);
- err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
- if (err)
- goto give_sigsegv;
+ for(i = 0; i < TARGET_NSIG_WORDS; i++) {
+ if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
+ goto give_sigsegv;
+ }
/* Set up to return from userspace. If provided, use a stub
already in userspace. */
fprintf(stderr, "do_sigreturn\n");
#endif
/* set blocked signals */
- target_set.sig[0] = frame->sc.oldmask;
- for(i = 1; i < TARGET_NSIG_WORDS; i++)
- target_set.sig[i] = frame->extramask[i - 1];
+ if (__get_user(target_set.sig[0], &frame->sc.oldmask))
+ goto badframe;
+ for(i = 1; i < TARGET_NSIG_WORDS; i++) {
+ if (__get_user(target_set.sig[i], &frame->extramask[i - 1]))
+ goto badframe;
+ }
- target_to_host_sigset(&set, &target_set);
+ target_to_host_sigset_internal(&set, &target_set);
sigprocmask(SIG_SETMASK, &set, NULL);
/* restore registers */
long do_rt_sigreturn(CPUX86State *env)
{
struct rt_sigframe *frame = (struct rt_sigframe *)(env->regs[R_ESP] - 4);
- target_sigset_t target_set;
sigset_t set;
// stack_t st;
int eax;
if (verify_area(VERIFY_READ, frame, sizeof(*frame)))
goto badframe;
#endif
- memcpy(&target_set, &frame->uc.uc_sigmask, sizeof(target_sigset_t));
-
- target_to_host_sigset(&set, &target_set);
+ target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
sigprocmask(SIG_SETMASK, &set, NULL);
- if (restore_sigcontext(env, &frame->uc.uc_mcontext, &eax))
+ if (restore_sigcontext(env, &frame->uc.tuc_mcontext, &eax))
goto badframe;
#if 0
- if (__copy_from_user(&st, &frame->uc.uc_stack, sizeof(st)))
+ if (__copy_from_user(&st, &frame->uc.tuc_stack, sizeof(st)))
goto badframe;
/* It is more difficult to avoid calling this function than to
call it and ignore errors. */
return 0;
}
+#elif defined(TARGET_ARM)
+
+struct target_sigcontext {
+ target_ulong trap_no;
+ target_ulong error_code;
+ target_ulong oldmask;
+ target_ulong arm_r0;
+ target_ulong arm_r1;
+ target_ulong arm_r2;
+ target_ulong arm_r3;
+ target_ulong arm_r4;
+ target_ulong arm_r5;
+ target_ulong arm_r6;
+ target_ulong arm_r7;
+ target_ulong arm_r8;
+ target_ulong arm_r9;
+ target_ulong arm_r10;
+ target_ulong arm_fp;
+ target_ulong arm_ip;
+ target_ulong arm_sp;
+ target_ulong arm_lr;
+ target_ulong arm_pc;
+ target_ulong arm_cpsr;
+ target_ulong fault_address;
+};
+
+typedef struct target_sigaltstack {
+ target_ulong ss_sp;
+ int ss_flags;
+ target_ulong ss_size;
+} target_stack_t;
+
+struct target_ucontext {
+ target_ulong tuc_flags;
+ target_ulong tuc_link;
+ target_stack_t tuc_stack;
+ struct target_sigcontext tuc_mcontext;
+ target_sigset_t tuc_sigmask; /* mask last for extensibility */
+};
+
+struct sigframe
+{
+ struct target_sigcontext sc;
+ target_ulong extramask[TARGET_NSIG_WORDS-1];
+ target_ulong retcode;
+};
+
+struct rt_sigframe
+{
+ struct target_siginfo *pinfo;
+ void *puc;
+ struct target_siginfo info;
+ struct target_ucontext uc;
+ target_ulong retcode;
+};
+
+#define TARGET_CONFIG_CPU_32 1
+
+/*
+ * For ARM syscalls, we encode the syscall number into the instruction.
+ */
+#define SWI_SYS_SIGRETURN (0xef000000|(TARGET_NR_sigreturn + ARM_SYSCALL_BASE))
+#define SWI_SYS_RT_SIGRETURN (0xef000000|(TARGET_NR_rt_sigreturn + ARM_SYSCALL_BASE))
+
+/*
+ * For Thumb syscalls, we pass the syscall number via r7. We therefore
+ * need two 16-bit instructions.
+ */
+#define SWI_THUMB_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_sigreturn))
+#define SWI_THUMB_RT_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_rt_sigreturn))
+
+static const target_ulong retcodes[4] = {
+ SWI_SYS_SIGRETURN, SWI_THUMB_SIGRETURN,
+ SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN
+};
+
+
+#define __put_user_error(x,p,e) __put_user(x, p)
+#define __get_user_error(x,p,e) __get_user(x, p)
+
+static inline int valid_user_regs(CPUState *regs)
+{
+ return 1;
+}
+
+static int
+setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
+ CPUState *env, unsigned long mask)
+{
+ int err = 0;
+
+ __put_user_error(env->regs[0], &sc->arm_r0, err);
+ __put_user_error(env->regs[1], &sc->arm_r1, err);
+ __put_user_error(env->regs[2], &sc->arm_r2, err);
+ __put_user_error(env->regs[3], &sc->arm_r3, err);
+ __put_user_error(env->regs[4], &sc->arm_r4, err);
+ __put_user_error(env->regs[5], &sc->arm_r5, err);
+ __put_user_error(env->regs[6], &sc->arm_r6, err);
+ __put_user_error(env->regs[7], &sc->arm_r7, err);
+ __put_user_error(env->regs[8], &sc->arm_r8, err);
+ __put_user_error(env->regs[9], &sc->arm_r9, err);
+ __put_user_error(env->regs[10], &sc->arm_r10, err);
+ __put_user_error(env->regs[11], &sc->arm_fp, err);
+ __put_user_error(env->regs[12], &sc->arm_ip, err);
+ __put_user_error(env->regs[13], &sc->arm_sp, err);
+ __put_user_error(env->regs[14], &sc->arm_lr, err);
+ __put_user_error(env->regs[15], &sc->arm_pc, err);
+#ifdef TARGET_CONFIG_CPU_32
+ __put_user_error(cpsr_read(env), &sc->arm_cpsr, err);
+#endif
+
+ __put_user_error(/* current->thread.trap_no */ 0, &sc->trap_no, err);
+ __put_user_error(/* current->thread.error_code */ 0, &sc->error_code, err);
+ __put_user_error(/* current->thread.address */ 0, &sc->fault_address, err);
+ __put_user_error(mask, &sc->oldmask, err);
+
+ return err;
+}
+
+static inline void *
+get_sigframe(struct emulated_sigaction *ka, CPUState *regs, int framesize)
+{
+ unsigned long sp = regs->regs[13];
+
+#if 0
+ /*
+ * This is the X/Open sanctioned signal stack switching.
+ */
+ if ((ka->sa.sa_flags & SA_ONSTACK) && !sas_ss_flags(sp))
+ sp = current->sas_ss_sp + current->sas_ss_size;
+#endif
+ /*
+ * ATPCS B01 mandates 8-byte alignment
+ */
+ return (void *)((sp - framesize) & ~7);
+}
+
+static int
+setup_return(CPUState *env, struct emulated_sigaction *ka,
+ target_ulong *rc, void *frame, int usig)
+{
+ target_ulong handler = (target_ulong)ka->sa._sa_handler;
+ target_ulong retcode;
+ int thumb = 0;
+#if defined(TARGET_CONFIG_CPU_32)
+#if 0
+ target_ulong cpsr = env->cpsr;
+
+ /*
+ * Maybe we need to deliver a 32-bit signal to a 26-bit task.
+ */
+ if (ka->sa.sa_flags & SA_THIRTYTWO)
+ cpsr = (cpsr & ~MODE_MASK) | USR_MODE;
+
+#ifdef CONFIG_ARM_THUMB
+ if (elf_hwcap & HWCAP_THUMB) {
+ /*
+ * The LSB of the handler determines if we're going to
+ * be using THUMB or ARM mode for this signal handler.
+ */
+ thumb = handler & 1;
+
+ if (thumb)
+ cpsr |= T_BIT;
+ else
+ cpsr &= ~T_BIT;
+ }
+#endif
+#endif
+#endif /* TARGET_CONFIG_CPU_32 */
+
+ if (ka->sa.sa_flags & TARGET_SA_RESTORER) {
+ retcode = (target_ulong)ka->sa.sa_restorer;
+ } else {
+ unsigned int idx = thumb;
+
+ if (ka->sa.sa_flags & TARGET_SA_SIGINFO)
+ idx += 2;
+
+ if (__put_user(retcodes[idx], rc))
+ return 1;
+#if 0
+ flush_icache_range((target_ulong)rc,
+ (target_ulong)(rc + 1));
+#endif
+ retcode = ((target_ulong)rc) + thumb;
+ }
+
+ env->regs[0] = usig;
+ env->regs[13] = (target_ulong)frame;
+ env->regs[14] = retcode;
+ env->regs[15] = handler & (thumb ? ~1 : ~3);
+
+#if 0
+#ifdef TARGET_CONFIG_CPU_32
+ env->cpsr = cpsr;
+#endif
+#endif
+
+ return 0;
+}
+
+static void setup_frame(int usig, struct emulated_sigaction *ka,
+ target_sigset_t *set, CPUState *regs)
+{
+ struct sigframe *frame = get_sigframe(ka, regs, sizeof(*frame));
+ int i, err = 0;
+
+ err |= setup_sigcontext(&frame->sc, /*&frame->fpstate,*/ regs, set->sig[0]);
+
+ for(i = 1; i < TARGET_NSIG_WORDS; i++) {
+ if (__put_user(set->sig[i], &frame->extramask[i - 1]))
+ return;
+ }
+
+ if (err == 0)
+ err = setup_return(regs, ka, &frame->retcode, frame, usig);
+ // return err;
+}
+
+static void setup_rt_frame(int usig, struct emulated_sigaction *ka,
+ target_siginfo_t *info,
+ target_sigset_t *set, CPUState *env)
+{
+ struct rt_sigframe *frame = get_sigframe(ka, env, sizeof(*frame));
+ int i, err = 0;
+
+ if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
+ return /* 1 */;
+
+ __put_user_error(&frame->info, (target_ulong *)&frame->pinfo, err);
+ __put_user_error(&frame->uc, (target_ulong *)&frame->puc, err);
+ err |= copy_siginfo_to_user(&frame->info, info);
+
+ /* Clear all the bits of the ucontext we don't use. */
+ err |= __clear_user(&frame->uc, offsetof(struct ucontext, uc_mcontext));
+
+ err |= setup_sigcontext(&frame->uc.tuc_mcontext, /*&frame->fpstate,*/
+ env, set->sig[0]);
+ for(i = 0; i < TARGET_NSIG_WORDS; i++) {
+ if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
+ return;
+ }
+
+ if (err == 0)
+ err = setup_return(env, ka, &frame->retcode, frame, usig);
+
+ if (err == 0) {
+ /*
+ * For realtime signals we must also set the second and third
+ * arguments for the signal handler.
+ * -- Peter Maydell <pmaydell@chiark.greenend.org.uk> 2000-12-06
+ */
+ env->regs[1] = (target_ulong)frame->pinfo;
+ env->regs[2] = (target_ulong)frame->puc;
+ }
+
+ // return err;
+}
+
+static int
+restore_sigcontext(CPUState *env, struct target_sigcontext *sc)
+{
+ int err = 0;
+ uint32_t cpsr;
+
+ __get_user_error(env->regs[0], &sc->arm_r0, err);
+ __get_user_error(env->regs[1], &sc->arm_r1, err);
+ __get_user_error(env->regs[2], &sc->arm_r2, err);
+ __get_user_error(env->regs[3], &sc->arm_r3, err);
+ __get_user_error(env->regs[4], &sc->arm_r4, err);
+ __get_user_error(env->regs[5], &sc->arm_r5, err);
+ __get_user_error(env->regs[6], &sc->arm_r6, err);
+ __get_user_error(env->regs[7], &sc->arm_r7, err);
+ __get_user_error(env->regs[8], &sc->arm_r8, err);
+ __get_user_error(env->regs[9], &sc->arm_r9, err);
+ __get_user_error(env->regs[10], &sc->arm_r10, err);
+ __get_user_error(env->regs[11], &sc->arm_fp, err);
+ __get_user_error(env->regs[12], &sc->arm_ip, err);
+ __get_user_error(env->regs[13], &sc->arm_sp, err);
+ __get_user_error(env->regs[14], &sc->arm_lr, err);
+ __get_user_error(env->regs[15], &sc->arm_pc, err);
+#ifdef TARGET_CONFIG_CPU_32
+ __get_user_error(cpsr, &sc->arm_cpsr, err);
+ cpsr_write(env, cpsr, 0xffffffff);
+#endif
+
+ err |= !valid_user_regs(env);
+
+ return err;
+}
+
+long do_sigreturn(CPUState *env)
+{
+ struct sigframe *frame;
+ target_sigset_t set;
+ sigset_t host_set;
+ int i;
+
+ /*
+ * Since we stacked the signal on a 64-bit boundary,
+ * then 'sp' should be word aligned here. If it's
+ * not, then the user is trying to mess with us.
+ */
+ if (env->regs[13] & 7)
+ goto badframe;
+
+ frame = (struct sigframe *)env->regs[13];
+
+#if 0
+ if (verify_area(VERIFY_READ, frame, sizeof (*frame)))
+ goto badframe;
+#endif
+ if (__get_user(set.sig[0], &frame->sc.oldmask))
+ goto badframe;
+ for(i = 1; i < TARGET_NSIG_WORDS; i++) {
+ if (__get_user(set.sig[i], &frame->extramask[i - 1]))
+ goto badframe;
+ }
+
+ target_to_host_sigset_internal(&host_set, &set);
+ sigprocmask(SIG_SETMASK, &host_set, NULL);
+
+ if (restore_sigcontext(env, &frame->sc))
+ goto badframe;
+
+#if 0
+ /* Send SIGTRAP if we're single-stepping */
+ if (ptrace_cancel_bpt(current))
+ send_sig(SIGTRAP, current, 1);
+#endif
+ return env->regs[0];
+
+badframe:
+ force_sig(SIGSEGV /* , current */);
+ return 0;
+}
+
+long do_rt_sigreturn(CPUState *env)
+{
+ struct rt_sigframe *frame;
+ sigset_t host_set;
+
+ /*
+ * Since we stacked the signal on a 64-bit boundary,
+ * then 'sp' should be word aligned here. If it's
+ * not, then the user is trying to mess with us.
+ */
+ if (env->regs[13] & 7)
+ goto badframe;
+
+ frame = (struct rt_sigframe *)env->regs[13];
+
+#if 0
+ if (verify_area(VERIFY_READ, frame, sizeof (*frame)))
+ goto badframe;
+#endif
+ target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask);
+ sigprocmask(SIG_SETMASK, &host_set, NULL);
+
+ if (restore_sigcontext(env, &frame->uc.tuc_mcontext))
+ goto badframe;
+
+#if 0
+ /* Send SIGTRAP if we're single-stepping */
+ if (ptrace_cancel_bpt(current))
+ send_sig(SIGTRAP, current, 1);
+#endif
+ return env->regs[0];
+
+badframe:
+ force_sig(SIGSEGV /* , current */);
+ return 0;
+}
+
+#elif defined(TARGET_SPARC)
+
+#define __SUNOS_MAXWIN 31
+
+/* This is what SunOS does, so shall I. */
+struct target_sigcontext {
+ target_ulong sigc_onstack; /* state to restore */
+
+ target_ulong sigc_mask; /* sigmask to restore */
+ target_ulong sigc_sp; /* stack pointer */
+ target_ulong sigc_pc; /* program counter */
+ target_ulong sigc_npc; /* next program counter */
+ target_ulong sigc_psr; /* for condition codes etc */
+ target_ulong sigc_g1; /* User uses these two registers */
+ target_ulong sigc_o0; /* within the trampoline code. */
+
+ /* Now comes information regarding the users window set
+ * at the time of the signal.
+ */
+ target_ulong sigc_oswins; /* outstanding windows */
+
+ /* stack ptrs for each regwin buf */
+ char *sigc_spbuf[__SUNOS_MAXWIN];
+
+ /* Windows to restore after signal */
+ struct {
+ target_ulong locals[8];
+ target_ulong ins[8];
+ } sigc_wbuf[__SUNOS_MAXWIN];
+};
+/* A Sparc stack frame */
+struct sparc_stackf {
+ target_ulong locals[8];
+ target_ulong ins[6];
+ struct sparc_stackf *fp;
+ target_ulong callers_pc;
+ char *structptr;
+ target_ulong xargs[6];
+ target_ulong xxargs[1];
+};
+
+typedef struct {
+ struct {
+ target_ulong psr;
+ target_ulong pc;
+ target_ulong npc;
+ target_ulong y;
+ target_ulong u_regs[16]; /* globals and ins */
+ } si_regs;
+ int si_mask;
+} __siginfo_t;
+
+typedef struct {
+ unsigned long si_float_regs [32];
+ unsigned long si_fsr;
+ unsigned long si_fpqdepth;
+ struct {
+ unsigned long *insn_addr;
+ unsigned long insn;
+ } si_fpqueue [16];
+} __siginfo_fpu_t;
+
+
+struct target_signal_frame {
+ struct sparc_stackf ss;
+ __siginfo_t info;
+ __siginfo_fpu_t *fpu_save;
+ target_ulong insns[2] __attribute__ ((aligned (8)));
+ target_ulong extramask[TARGET_NSIG_WORDS - 1];
+ target_ulong extra_size; /* Should be 0 */
+ __siginfo_fpu_t fpu_state;
+};
+struct target_rt_signal_frame {
+ struct sparc_stackf ss;
+ siginfo_t info;
+ target_ulong regs[20];
+ sigset_t mask;
+ __siginfo_fpu_t *fpu_save;
+ unsigned int insns[2];
+ stack_t stack;
+ unsigned int extra_size; /* Should be 0 */
+ __siginfo_fpu_t fpu_state;
+};
+
+#define UREG_O0 16
+#define UREG_O6 22
+#define UREG_I0 0
+#define UREG_I1 1
+#define UREG_I2 2
+#define UREG_I6 6
+#define UREG_I7 7
+#define UREG_L0 8
+#define UREG_FP UREG_I6
+#define UREG_SP UREG_O6
+
+static inline void *get_sigframe(struct emulated_sigaction *sa, CPUState *env, unsigned long framesize)
+{
+ unsigned long sp;
+
+ sp = env->regwptr[UREG_FP];
+#if 0
+
+ /* This is the X/Open sanctioned signal stack switching. */
+ if (sa->sa_flags & TARGET_SA_ONSTACK) {
+ if (!on_sig_stack(sp) && !((current->sas_ss_sp + current->sas_ss_size) & 7))
+ sp = current->sas_ss_sp + current->sas_ss_size;
+ }
+#endif
+ return (void *)(sp - framesize);
+}
+
+static int
+setup___siginfo(__siginfo_t *si, CPUState *env, target_ulong mask)
+{
+ int err = 0, i;
+
+ err |= __put_user(env->psr, &si->si_regs.psr);
+ err |= __put_user(env->pc, &si->si_regs.pc);
+ err |= __put_user(env->npc, &si->si_regs.npc);
+ err |= __put_user(env->y, &si->si_regs.y);
+ for (i=0; i < 8; i++) {
+ err |= __put_user(env->gregs[i], &si->si_regs.u_regs[i]);
+ }
+ for (i=0; i < 8; i++) {
+ err |= __put_user(env->regwptr[UREG_I0 + i], &si->si_regs.u_regs[i+8]);
+ }
+ err |= __put_user(mask, &si->si_mask);
+ return err;
+}
+
+#if 0
+static int
+setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
+ CPUState *env, unsigned long mask)
+{
+ int err = 0;
+
+ err |= __put_user(mask, &sc->sigc_mask);
+ err |= __put_user(env->regwptr[UREG_SP], &sc->sigc_sp);
+ err |= __put_user(env->pc, &sc->sigc_pc);
+ err |= __put_user(env->npc, &sc->sigc_npc);
+ err |= __put_user(env->psr, &sc->sigc_psr);
+ err |= __put_user(env->gregs[1], &sc->sigc_g1);
+ err |= __put_user(env->regwptr[UREG_O0], &sc->sigc_o0);
+
+ return err;
+}
+#endif
+#define NF_ALIGNEDSZ (((sizeof(struct target_signal_frame) + 7) & (~7)))
+
+static void setup_frame(int sig, struct emulated_sigaction *ka,
+ target_sigset_t *set, CPUState *env)
+{
+ struct target_signal_frame *sf;
+ int sigframe_size, err, i;
+
+ /* 1. Make sure everything is clean */
+ //synchronize_user_stack();
+
+ sigframe_size = NF_ALIGNEDSZ;
+
+ sf = (struct target_signal_frame *)
+ get_sigframe(ka, env, sigframe_size);
+
+ //fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
+#if 0
+ if (invalid_frame_pointer(sf, sigframe_size))
+ goto sigill_and_return;
+#endif
+ /* 2. Save the current process state */
+ err = setup___siginfo(&sf->info, env, set->sig[0]);
+ err |= __put_user(0, &sf->extra_size);
+
+ //err |= save_fpu_state(regs, &sf->fpu_state);
+ //err |= __put_user(&sf->fpu_state, &sf->fpu_save);
+
+ err |= __put_user(set->sig[0], &sf->info.si_mask);
+ for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) {
+ err |= __put_user(set->sig[i + 1], &sf->extramask[i]);
+ }
+
+ for (i = 0; i < 8; i++) {
+ err |= __put_user(env->regwptr[i + UREG_L0], &sf->ss.locals[i]);
+ }
+ for (i = 0; i < 8; i++) {
+ err |= __put_user(env->regwptr[i + UREG_I0], &sf->ss.ins[i]);
+ }
+ if (err)
+ goto sigsegv;
+
+ /* 3. signal handler back-trampoline and parameters */
+ env->regwptr[UREG_FP] = (target_ulong) sf;
+ env->regwptr[UREG_I0] = sig;
+ env->regwptr[UREG_I1] = (target_ulong) &sf->info;
+ env->regwptr[UREG_I2] = (target_ulong) &sf->info;
+
+ /* 4. signal handler */
+ env->pc = (unsigned long) ka->sa._sa_handler;
+ env->npc = (env->pc + 4);
+ /* 5. return to kernel instructions */
+ if (ka->sa.sa_restorer)
+ env->regwptr[UREG_I7] = (unsigned long)ka->sa.sa_restorer;
+ else {
+ env->regwptr[UREG_I7] = (unsigned long)(&(sf->insns[0]) - 2);
+
+ /* mov __NR_sigreturn, %g1 */
+ err |= __put_user(0x821020d8, &sf->insns[0]);
+
+ /* t 0x10 */
+ err |= __put_user(0x91d02010, &sf->insns[1]);
+ if (err)
+ goto sigsegv;
+
+ /* Flush instruction space. */
+ //flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0]));
+ // tb_flush(env);
+ }
+ return;
+
+ //sigill_and_return:
+ force_sig(TARGET_SIGILL);
+sigsegv:
+ //fprintf(stderr, "force_sig\n");
+ force_sig(TARGET_SIGSEGV);
+}
+static inline int
+restore_fpu_state(CPUState *env, __siginfo_fpu_t *fpu)
+{
+ int err;
+#if 0
+#ifdef CONFIG_SMP
+ if (current->flags & PF_USEDFPU)
+ regs->psr &= ~PSR_EF;
+#else
+ if (current == last_task_used_math) {
+ last_task_used_math = 0;
+ regs->psr &= ~PSR_EF;
+ }
+#endif
+ current->used_math = 1;
+ current->flags &= ~PF_USEDFPU;
+#endif
+#if 0
+ if (verify_area (VERIFY_READ, fpu, sizeof(*fpu)))
+ return -EFAULT;
+#endif
+
+ err = __copy_from_user(&env->fpr[0], &fpu->si_float_regs[0],
+ (sizeof(unsigned long) * 32));
+ err |= __get_user(env->fsr, &fpu->si_fsr);
+#if 0
+ err |= __get_user(current->thread.fpqdepth, &fpu->si_fpqdepth);
+ if (current->thread.fpqdepth != 0)
+ err |= __copy_from_user(¤t->thread.fpqueue[0],
+ &fpu->si_fpqueue[0],
+ ((sizeof(unsigned long) +
+ (sizeof(unsigned long *)))*16));
+#endif
+ return err;
+}
+
+
+static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
+ target_siginfo_t *info,
+ target_sigset_t *set, CPUState *env)
+{
+ fprintf(stderr, "setup_rt_frame: not implemented\n");
+}
+
+long do_sigreturn(CPUState *env)
+{
+ struct target_signal_frame *sf;
+ uint32_t up_psr, pc, npc;
+ target_sigset_t set;
+ sigset_t host_set;
+ target_ulong fpu_save;
+ int err, i;
+
+ sf = (struct target_signal_frame *) env->regwptr[UREG_FP];
+#if 0
+ fprintf(stderr, "sigreturn\n");
+ fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
+#endif
+ //cpu_dump_state(env, stderr, fprintf, 0);
+
+ /* 1. Make sure we are not getting garbage from the user */
+#if 0
+ if (verify_area (VERIFY_READ, sf, sizeof (*sf)))
+ goto segv_and_exit;
+#endif
+
+ if (((uint) sf) & 3)
+ goto segv_and_exit;
+
+ err = __get_user(pc, &sf->info.si_regs.pc);
+ err |= __get_user(npc, &sf->info.si_regs.npc);
+
+ if ((pc | npc) & 3)
+ goto segv_and_exit;
+
+ /* 2. Restore the state */
+ err |= __get_user(up_psr, &sf->info.si_regs.psr);
+
+ /* User can only change condition codes and FPU enabling in %psr. */
+ env->psr = (up_psr & (PSR_ICC /* | PSR_EF */))
+ | (env->psr & ~(PSR_ICC /* | PSR_EF */));
+
+ env->pc = pc;
+ env->npc = npc;
+ err |= __get_user(env->y, &sf->info.si_regs.y);
+ for (i=0; i < 8; i++) {
+ err |= __get_user(env->gregs[i], &sf->info.si_regs.u_regs[i]);
+ }
+ for (i=0; i < 8; i++) {
+ err |= __get_user(env->regwptr[i + UREG_I0], &sf->info.si_regs.u_regs[i+8]);
+ }
+
+ err |= __get_user(fpu_save, (target_ulong *)&sf->fpu_save);
+
+ //if (fpu_save)
+ // err |= restore_fpu_state(env, fpu_save);
+
+ /* This is pretty much atomic, no amount locking would prevent
+ * the races which exist anyways.
+ */
+ err |= __get_user(set.sig[0], &sf->info.si_mask);
+ for(i = 1; i < TARGET_NSIG_WORDS; i++) {
+ err |= (__get_user(set.sig[i], &sf->extramask[i - 1]));
+ }
+
+ target_to_host_sigset_internal(&host_set, &set);
+ sigprocmask(SIG_SETMASK, &host_set, NULL);
+
+ if (err)
+ goto segv_and_exit;
+
+ return env->regwptr[0];
+
+segv_and_exit:
+ force_sig(TARGET_SIGSEGV);
+}
+
+long do_rt_sigreturn(CPUState *env)
+{
+ fprintf(stderr, "do_rt_sigreturn: not implemented\n");
+ return -ENOSYS;
+}
+
+
+#else
+
+static void setup_frame(int sig, struct emulated_sigaction *ka,
+ target_sigset_t *set, CPUState *env)
+{
+ fprintf(stderr, "setup_frame: not implemented\n");
+}
+
+static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
+ target_siginfo_t *info,
+ target_sigset_t *set, CPUState *env)
+{
+ fprintf(stderr, "setup_rt_frame: not implemented\n");
+}
+
+long do_sigreturn(CPUState *env)
+{
+ fprintf(stderr, "do_sigreturn: not implemented\n");
+ return -ENOSYS;
+}
+
+long do_rt_sigreturn(CPUState *env)
+{
+ fprintf(stderr, "do_rt_sigreturn: not implemented\n");
+ return -ENOSYS;
+}
+
#endif
void process_pending_signals(void *cpu_env)
k->first = q->next;
if (!k->first)
k->pending = 0;
+
+ sig = gdb_handlesig (cpu_env, sig);
+ if (!sig) {
+ fprintf (stderr, "Lost signal\n");
+ abort();
+ }
handler = k->sa._sa_handler;
if (handler == TARGET_SIG_DFL) {
sigprocmask(SIG_BLOCK, &set, &old_set);
/* save the previous blocked signal state to restore it at the
end of the signal execution (see do_sigreturn) */
- host_to_target_sigset(&target_old_set, &old_set);
+ host_to_target_sigset_internal(&target_old_set, &old_set);
/* if the CPU is in VM86 mode, we restore the 32 bit values */
#ifdef TARGET_I386